From: Jody McIntyre <scjody@steamballoon.com>
Date: Tue, 17 May 2005 04:54:05 +0000 (-0700)
Subject: [PATCH] ieee1394: fix cross_bound check for null ISO packets
X-Git-Tag: v2.6.12-rc5~111
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=74a01d11c92c06a0ceac88ca306d507a8186e7f6;p=linux-2.6

[PATCH] ieee1394: fix cross_bound check for null ISO packets

Fix cross_bound to not return 1 for zero-length regions.  Fixes regression
when sending null ISO packets.

Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/ieee1394/ohci1394.h b/drivers/ieee1394/ohci1394.h
index d1758d4096..cc66c1cae2 100644
--- a/drivers/ieee1394/ohci1394.h
+++ b/drivers/ieee1394/ohci1394.h
@@ -236,6 +236,9 @@ struct ti_ohci {
 
 static inline int cross_bound(unsigned long addr, unsigned int size)
 {
+	if (size == 0)
+		return 0;
+
 	if (size > PAGE_SIZE)
 		return 1;